In fact most airdrop hunter and bounty hunters are not being patience enough to hold the tokens/coins they earn from the aridrop/bounties. I am quite aure 90% or more people are selling what they earn after they received it or once it is listed on exchange.
I think many hunters are too ambitious in wanting to get money so when they get it they immediately sell it without thinking, even though if you look at a good project concept they can hold it and sell after it goes up high but it's true that most airdrop and bounty hunters will definitely release to the direct market.
Sometimes I like to do that with airdrop tokens but after a few months the tokens actually go up, and it's a little annoying for me to sell them so early.